I know what authors go through to mix realism and values. It's not an easy thing and people make their own choices, which I respect.
In reality, the amount of language in this book compared to what most people in todays world would be saying in similar circumstances is probably light. Whether I agree with it or not, or would say those words myself in the given circumstances, is really immaterial to what most people would do and expect...if one takes that view of it.
Great story...hope it is very successful for E.E. Knight...I am sure it is going to be.